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The main diseases of amaryllis: why leaves turn yellow, how to get rid of pests and other problems

The main diseases of amaryllis: why leaves turn yellow, how to get rid of pests and other problems


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Amaryllis is a perennial plant. Its foliage grows up to half a meter in length and up to 4 cm in width. In addition to large leaves, the plant throws out fleshy arrows on which flowers appear. To admire the flowering as long as possible, you need to know the possible problems with the development of the plant and how to solve them. Further in the article, it is told about the main diseases and pests of the plant and about methods of dealing with them.

Growing problems and their causes

During the growing period of amaryllis, the florist is faced with a number of problems. Some of them are associated with sheet plates.

Why do the leaves turn yellow?

Two factors lead to this process:

  • waterlogging of an earthen coma;
  • vital activity of parasites - aphids and thrips.

To combat the problem, watering is normalized - reduce its abundance and frequency, as well as destroy pests. For this, fungicidal preparations are used.

Flowers droop

There are often two explanations for this:

  • incorrectly selected flowerpot;
  • lack of a drainage layer and holes.

To solve the problem, you need to pay attention to the size of the pot. It should not be too large, but the root system should not be cramped. The best option is the diameter of the pot is 2-3 cm larger than the volume of the rhizome.

Also check the drainage layer in the tank - its height is about 2-3 cm. Drainage can be made from small pebbles, broken bricks. Remember to punch holes in the bottom of the pot. All these manipulations contribute to the removal of excess moisture.

Leaves darken or rot

Sometimes the leaf plates begin to darken or even rot.... This happens for the following reasons:

  • high levels of air humidity;
  • cold air;
  • abundant soil moisture.

To save the plant, you need to move it to a dry, heated room. Watering is necessary only when the topsoil dries out by 2-3 cm. When watering, make sure that no drops of water fall on the foliage.

Other problems

In addition to the leaves, the flowers of the plant can also be problematic.

Lack of buds

The plant does not make you happy with its flowers due to several negative factors.:

  • bad light;
  • poor soil;
  • the bulb is planted too deep;
  • the root system is sick;
  • the plant did not have a dormant period;
  • the flower has not been transplanted and rejuvenated for a long time.

After eliminating the listed problems, amaryllis will begin to bloom.

reference! A plant grown from seed will only produce buds at 7 years of development, and when planting the bulb, you can see flowering for 3 years.

Find out why amaryllis does not bloom and how to make it give buds here.

Petals turn pale

Most likely, the petals just fade in the sun. This happens if the flowerpot with a flower is constantly in direct sunlight. To avoid this problem, protect the plant from the scorching sun - in summer, do not place the pots on the southern windowsills.

Major diseases and their treatment

Stagonosporosis

A characteristic symptom of the disease is the appearance of red pigmentation on the surface of the plant.... Moreover, spots can appear not only on the leaves and shoot, but even on the bulb.

This disease is contagious and spreads very quickly. Therefore, at the first sign, isolate the affected plant from healthy ones.

It will not be possible to cure a flower from stagonosporosis. Therefore, one must try to prevent defeat. For this, it is important not to allow sudden changes in temperature and not to overmoisten the soil.

Anthracnose

This disease can be identified by dark spots with brown smudges. You can notice the infection on the foliage. If untreated, the spots grow and spread throughout the entire ground part of the amaryllis (read about the structure of the amaryllis and the appearance of the amaryllis here). After some time, the spots turn into small depressions that prevent nutrients from reaching the plant. The flower is affected by anthracnose due to the abundant moisture in the soil..

To save the flower, it is treated with a fungicide and reduces watering. The most effective drugs:

  1. Ridomil.
  2. Speed
  3. Acrobat.

Gray rot

The first signs are that dark spots appear on the surface of the plant, which eventually become covered with a light gray bloom. The spots gradually increase and brighten, the plaque intensifies.

First, the disease affects wilted and dying parts of the plant, and then spreads to healthy areas.

Gray rot destroys leaves, buds, and shoots of a flower. The disease develops with too humid air, temperature fluctuations, and poor lighting. The spores of the fungus can enter a healthy plant by wind or water.

If a disease is detected, the affected plant is isolated and treated with fungicides.... For preventive purposes, healthy flowers can also be processed.

Fusarium

Affects the root system of the plant. On the particles of the onion that looks out of the ground, you can see the rotten areas. The disease develops very quickly. Fusarium can be caused by:

  • improper soil composition (usually when the soil is too clogged);
  • waterloggedness of the substrate (due to its abundant moisture and the absence of drainage holes);
  • lack of useful elements.

To combat fusarium, you need to treat the soil and flowerpot with Fundazol.

As an additional control measure, you can put the soil mixture in the freezer for several hours - so the remaining bacteria will die completely.

The main pests

The plant can also be attacked by pests. Consider the parasites characteristic of amaryllis.

Amaryllis bug

This small waxy white insect develops in the scales of the bulb. And the feces of parasites are a great place for the development of fungal diseases. As a result, the affected plant slowly loses leaf plates and stops growing.

To determine the pest, the bulb must be removed from the earthen coma and examined - the insect usually sits under the skin.

First, the pest is removed mechanically, and then treated with an insecticide. The most affordable and effective:

  • Aktara.
  • Fitoverm.
  • Spark.

The method of preparation and use is indicated on the package.

The bulb is planted in a new substrate.

False shield

Small pest of brown shade... They live in colonies on amaryllis leaf plates. You can notice the defeat by the bloom on the leaves and trunk - these are colonies of scale insects.

Affected amaryllis grows slowly or stops growing altogether, its foliage turns yellow and falls off. Scales appear on the remaining leaves, which will be problematic to separate.

The parasite develops in a dry and warm environment. Females appear on the plant in May-June, and begin to lay the larvae in August.

You can fight false shield with the following drugs:

  • soap solution (rub half a bar of laundry soap into a glass of water, then pour 50 ml of alcohol into the mixture, wipe the surface of the flower with the agent);
  • Aktara solution;
  • Actellik;
  • Bankcol.

Thrips

The same small brown insects. Can be seen on the amaryllis leaf plates. They fight thrips with such means:

  • Aktara.
  • Fitoverm.
  • Spark.

Processing is carried out twice with an interval of 5-7 days.

Mealybug

White insects that settle on the ground part of the flower... After defeat, a white bloom and the same light spots appear on the plant. The parasite sucks out the juices from the flower, which leads to its slow wilting. You can get rid of the pest with a soapy solution.

In case of severe damage, the drug is used:

  • Admiral.
  • Fitoverm.

Onion mite

The pest infects the bulb. You can recognize the pest by the rotting and wilting of the ground part for no apparent reason. The insect is very small - sometimes its body does not even reach 2 mm, the body is yellow, tapering towards the end.

If severely damaged by a tick, the bulb will crumble in the hands. After opening the bulb, white traces of the parasite's vital activity can be seen inside.

It is rarely possible to save the flower. It is necessary to rinse the bulb in a solution of any fungicide, and then transplant it into a new substrate.

As a preventive measure, the soil is spilled with a weak solution of potassium permanganate or Keltan.

Amaryllis is an unusual and eye-catching plant, but at the same time it requires constant and attentive care (read about caring for amaryllis at home here, and learn about growing on the street and at home here). Subject to all the recommendations for growing, this flower will delight you with its opened buds and beautiful large leaves.

Related Videos

We offer you to watch a useful video about amaryllis diseases:

And about pests:


Watch the video: How to Identify u0026 Control Common Garden Pests by Leaf Signatures (June 2022).